燕雀安知鸿鹄之志yàn què ān zhī hóng hú zhī zhì释义lit. can the sparrow and swallow know the will of the great swan? (idiom)fig. how can we small fry predict the ambitions of the great?单字详解燕yan雀que安an知zhi鸿hong鹄gu之zhi志zhi